Working with discrete semiconductors requires consistent, careful handling habits that avoid hidden damage you cannot see with the naked eye. Even small missteps during storage, inspection, or installation can create latent defects that only cause failures weeks or months after the parts are integrated into a finished assembly. Following a clear set of do’s and don’ts eliminates these avoidable risks, and keeps every component performing exactly as intended through its full expected service life.

‌Do Control Electrostatic Discharge at Every Step‌
Treat every discrete semiconductor part as static-sensitive from the moment you open its original packaging, even if the component does not come marked with a prominent ESD warning. Always work at a properly grounded work surface, wear a securely connected anti-static wristband, and keep all loose plastic, foam, and synthetic fabrics away from your immediate work area. Before you touch any component, touch a grounded metal object first to discharge any static charge that has built up on your clothing or skin.
Keep all parts inside their static-shielding bags until you are ready to use them, and never carry loose discrete semiconductors in your pockets or in unprotected plastic trays. Even a tiny, invisible static discharge that you cannot feel can punch through the thin internal dielectric layers inside a component, creating a hidden weak point that will fail unexpectedly under normal operating stress later.

‌Don’t Exceed Specified Thermal Limits During Soldering or Rework‌
One of the most common causes of premature discrete semiconductor failure is uncontrolled, excessive heat exposure during assembly or repair. Never hold a hot soldering iron against the component leads for longer than the rated maximum time listed in the part documentation, and always leave enough space between the solder joint and the component body so heat does not wick up into the internal semiconductor die. Use a properly sized, temperature-controlled iron, never a cheap unregulated unit that spikes to far higher temperatures than you intend.
Never attempt to desolder or remove a discrete semiconductor from a board without using a proper heat sink clamped to the leads on the component side. Applying unmanaged high heat directly to the body of the part can melt internal wire bonds, crack the semiconductor die, or permanently shift the core electrical parameters far outside their rated tolerances. These kinds of thermal damage faults are often intermittent and extremely hard to diagnose, wasting hours of troubleshooting time later in the testing process.

‌Do Inspect Every Component for Physical Damage Before Use‌
Take a few seconds to visually examine every discrete semiconductor before you install it on a board, even if it came straight from a sealed new shipment. Look for cracked or chipped packaging resin, bent or corroded leads, and any faint signs of burn marks or discoloration on the component body. If you spot even a tiny crack in the outer encapsulation, set the part aside immediately — that small opening will let in moisture and contaminants that will degrade the internal die over time.
For parts that have been in storage for a long period, gently straighten any slightly bent leads with a pair of smooth, padded tweezers, instead of bending them back and forth repeatedly. Metal leads that are flexed back and forth too many times will develop micro-fractures that break the internal electrical connection completely after a small amount of physical vibration in the field. A quick pre-installation inspection takes almost no time, but it stops obviously damaged parts from ever making it onto your assembly boards.

‌Don’t Store Loose Parts in Uncontrolled Humid or Dirty Environments‌
Never leave discrete semiconductors sitting out on an open workbench for hours or days after you open their packaging, especially in spaces with high ambient humidity, airborne soldering fumes, or fine metal dust. Exposed leads will develop thin layers of surface corrosion very quickly, which creates high-resistance connections that cause unstable electrical performance once the part is soldered into a circuit.
Keep all unused discrete semiconductors sealed inside clean, dry, static-shielding containers, with fresh desiccant packs added if your work or storage space regularly sees high humidity levels. Never toss loose discrete parts into unmarked plastic bags, mixed parts bins, or cardboard boxes full of other random hardware. These unorganized storage practices scratch component bodies, bend leads, and expose parts to all kinds of unnecessary contamination that creates hard-to-spot quality issues down the line.